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(禾本科):一种来自非洲南部德拉肯斯堡山脉植物特有中心复合体中的常见新物种,附带该复合体中分类群的检索表及注释,包括被忽视的分类群。

(Poaceae): A common new species in the complex from the Drakensberg Mountain Centre of Floristic Endemism, southern Africa, with key and notes on taxa in the complex including the overlooked .

作者信息

Sylvester Steven P, Soreng Robert J, Sylvester Mitsy D P V, Clark Vincent Ralph

机构信息

College of Biology and the Environment, Nanjing Forestry University, Long Pan Road No. 159, Nanjing, 210037, China Nanjing Forestry University Nanjing China.

Department of Botany, National Museum of Natural History, Smithsonian Institution, Washington DC 20013-7012, USA Smithsonian Institution Washington United States of America.

出版信息

PhytoKeys. 2020 Oct 7;162:45-69. doi: 10.3897/phytokeys.162.55550. eCollection 2020.

Abstract

We present taxonomic notes on the complex from southern Africa that includes description and illustration of the new species from the Drakensberg Mountain Centre of Floristic Endemism of South Africa and Lesotho. can be differentiated from s.l. by forming lax short tufts with extravaginally-branching tillers and lateral-tending cataphyllous shoots or rhizomes present, basal foliage reaching < ½ the length of the culms, with generally shorter leaves and shorter anthers, 0.8-1.6(-1.8) mm long. The species also differs from the overlooked species - currently known from two collections from Lesotho - by its fibrous basal sheaths, usually sharp, keel-like leaf blade midrib, drooping panicle with lightly to densely scabrous pendent panicle branches, longer lemmas, 4.5-5.8 mm long, with awns usually present, 0.5-3 mm long, ovary apices sparsely to densely hairy and anthers 0.8-1.6(-1.8) mm long. Taxonomic notes on the different taxa of the complex in southern Africa are also provided, including images, key, and lectotypification of F. caprina var. curvula. This research adds a further two endemic species ( and ) and two endemic varieties (F. caprina var. irrasa and F. caprina var. macra) to the Drakensberg Mountain Centre of Floristic Endemism.

摘要

我们提供了关于来自南部非洲的该复合体的分类学注释,其中包括对来自南非和莱索托植物区系特有性德拉肯斯堡山脉中心的新物种的描述和图示。该物种可以与广义的[某物种名]区分开来,其形成松散的短簇,具鞘外分枝的分蘖以及具侧生叶鞘的枝条或根状茎,基部叶长不及秆长的1/2,叶片通常较短,花药也较短,长0.8 - 1.6(-1.8)毫米。该物种还与被忽视的[另一物种名](目前仅从莱索托的两份标本得知)不同,其基部叶鞘具纤维,叶片中脉通常尖锐呈龙骨状,圆锥花序下垂,圆锥花序分枝下垂且具轻度至密集的糙毛,外稃较长,长4.5 - 5.8毫米,通常具芒,芒长0.5 - 3毫米,子房顶端疏生至密被毛,花药长0.8 - 1.6(-1.8)毫米。我们还提供了南部非洲该复合体不同分类群的分类学注释,包括图片、检索表以及F. caprina var. curvula的选定模式。这项研究为德拉肯斯堡山脉植物区系特有性中心又增加了两个特有物种([物种名1]和[物种名2])以及两个特有变种(F. caprina var. irrasa和F. caprina var. macra)。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0005/7557330/0569737eb93e/phytokeys-162-045-g001.jpg

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